I. Thou shalt not use ALL CAPS in forums.
II. Thou shalt respect the Internet God, but not to the point of having zero sense of humor.
III. Thou shalt not trick the innocent into visiting obscene web sites. (That includes your boss.)
IV. Thou shalt not flame.
V. Remember the server, and keep it holy. Thou shalt not waste internet space with pointless fan fiction or personal "All About Bob Smith And His Various Boring Hobbies" web sites. Those are an abomination unto the Internet God.
VI. Thou shalt not spam.
VII. Thou shalt not send emails to friends and coworkers with "1001 Lawyer Jokes," "You Might Be A Redneck If..." or any top ten list. Believe me, these get deleted unread.
VIII. Thou shalt not covet thy neighbor's web page.
IX. Thou shalt be moderate in th use of "lol" in thy internet conversations. The same goes for the little smiley face :-)
X. Again, thou shalt PLEASE not use all caps in forums.